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Populaire >

15 choose 9

Solution

15c9

Solution

5005

étapes des solutions

= \frac{n !}{r ! ( n - r ) !}

Insérer

n = 15, r = 9

= \frac{15 !}{9 ! ( 15 - 9 ) !}

\frac{15 !}{9 ! ( 15 - 9 ) !} = 5005

= 5005

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